the accused shooter paul ciancia is hospitalized and authorities say he has been unresponsive. federal prosecutors have filed murder charges against him. dominic is outside l.a.x. with more. dominic? >> hi there, shannon. the associated press reporting in the last few minutes quoting an unidentified law enforcement official saying that as he was arrested, the gunman, suspected it to be paul ciancia, the 23-year-old from new jersey said to them he acted alone and he had been dropped off at the airport by a friend. right now according to that law enforcement official he is sedated. we understand he is at the ronald reagan ucla medical center and he is -- as the fbi was saying he is unresponsive. he has an armed guard apparently standing next to him. and details of really what happened in the airport as he made his way into terminal 3, shooting one guard, seeing the guard injured and coming back to shoot him again. and the authorities in a criminal complaint laying out charges against him, one of killing a federal officer and also committing violence at an international airport. t